I bought a ceiner before I noticed it did not have a decocker. Hard to practice ready position and draw when you have to trigger decock all the time.
I now have a beretta made kit, very nice. I would highly suggest it. I plan on putting a fixed sight on it to replicate the 9mm version.
Why not practice with the same grip, trigger pull, and sights that you would use in real life? Plus the ready and draw stroke remain the same regardless of recoil. As far as magazines, they are very similiar and reloads remain the same for all practical purposes, though IMO reloading is the least most important weapons skill.
I also have a Ceiner kit for a 1911, I think I'd get a Kimber if I did it again.
I have a Advantage Arms kit for a G19, it is very nice.
I have a DPMS M4 upper, it also is very nice.
Now waiting on the AWC suppressor then I have to get all the barrels done on my kits.